More news keeps coming related to Google's announcement that it was hit by cyber attacks from China. Datamation has some surprising details on how the attack occurred.

McAfee (NYSE: MFE) on Thursday said a new and previously undisclosed zero-day vulnerability in Microsoft's Internet Explorer software provided the opening hackers needed earlier this week to break into the networks used and operated by Google and as many as 20 different high-profile corporations.

In a blog entry posted Thursday afternoon, McAfee CTO George Kurtz said his team of researchers worked "around the clock" with "multiple organizations" that were hit by the highly sophisticated and coordinated attack as well as the U.S. government and various law enforcement agencies.

After analyzing several pieces of malicious code used to access the networks, McAfee researchers determined that the hackers had themselves assigned the "Aurora" moniker to the series of unprecedented attacks.